Methods of drilling

Patent metadata

Field	Value
Publication number	US-10000682-B2
Application number	US-201615223752-A
Country	US
Kind code	B2
Filing date	Jul 29, 2016
Priority date	Jul 29, 2015
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

A method of drilling a subterranean well may include drilling the subterranean well while circulating a wellbore fluid in the subterranean well, wherein the wellbore fluid includes a base fluid; and a ground weight material comprising barite and quartz and having a d 50 between about 4 and 8 microns and a d 90 between about 15-25 microns.

First claim

What is claimed:

1. A method of drilling a subterranean well, comprising:
drilling the subterranean well while circulating a wellbore fluid in the subterranean well,
wherein the wellbore fluid comprises:
a base fluid; and
a ground weight material comprising barite and quartz and having a d 50 between about 4 and 8 microns and a d 90 between about 15-25 microns,
wherein the wellbore fluid has a viscosity between about 12,000 and 20,000 cP at 0.17 −1 and between about 1,500 and 2,500 cP at 1.7 s −1 , and wherein the wellbore fluid has a viscosity of at least 20 lbs/100 ft 2 between 30 and 100 rpm.

2. The method of claim 1 , wherein the weight material has a specific gravity of less than or equal to about 4.2.

3. The method of claim 1 , wherein the weight material has a weight percent of quartz of about 4 to 12 percent.

4. The method of claim 3 , wherein the ground weight material has a weight percent of quartz ranging between about 5 and 7 percent.

5. The method of claim 1 , wherein the quartz has a larger average particle size than the barite.

6. The method of claim 1 , wherein the weight material has a d 90 between about 18-22 microns.

7. The method of claim 1 , wherein the weight material has a d 50 between about 4-8 microns.

8. The method of claim 1 , wherein the weight material has a d 75 between about 12-14 microns.

9. The method of claim 1 , wherein the weight material has a d 85 between about 15-17 microns.

10. The method of claim 1 , wherein the weight material has a d 95 between about 24-34 microns.

11. The method of claim 1 , wherein the weight material has a d 98 between about 32-60 microns.

12. The method of claim 1 , wherein the weight material has a d 98 between about 32-60 microns.

13. The method of claim 1 , wherein the weight material has a d 99.5 between about 48-120 microns.

14. The method of claim 1 , wherein the base fluid is one selected from a water-based fluid, an invert emulsion, and a direct emulsion.

15. A method of treating a wellbore, comprising:
pumping into the wellbore a wellbore fluid, the wellbore fluid comprising:
a base fluid; and
a ground weight material comprising barite and quartz and having a d 50 between about 4 and 8 microns and a d 90 between about 15-25 microns,
wherein the wellbore fluid has a viscosity between about 12,000 and 20,000 cP at 0.17 s −1 and between about 1,500 and 2,500 cP at 1.7 s −1 , and wherein the wellbore fluid has a viscosity of at least 20 lbs/100 ft 2 between 30 and 100 rpm.

Assignees

• Mi Llc

Inventors

• Bouguetta Chemsseddine
• Matlock Roger Wayne
• Conn Henry Lee
• Bailey Robert
• Friedheim James

Classifications

• C09K8/032 Primary

  Inorganic additives · CPC title

• C09K8/03 Primary

  Specific additives for general use in well-drilling compositions · CPC title

• C09K8/04

  Aqueous well-drilling compositions · CPC title

• C09K8/26

  Oil-in-water emulsions · CPC title

• C09K8/32

  Non-aqueous well-drilling compositions, e.g. oil-based · CPC title